(computing theory) A concise description of a regular formal language with notations for concatenation, alternation, and iteration (repetition) of subexpressions.

(mathematics) a meromorphic function

(grammar) A verb which conjugates regularly. In English, a verb which uses an -ed suffix to form its past participle.

plural of regular expression

(dialectal, US, New England) Coffee with cream and sugar (in contrast to the expected meaning of "black coffee" in other regions of the USA). / (dialectal) Black coffee

plural of regular polygon

(finance) A dividend on common stock that is intended to be paid periodically in equal amounts over the course of a year, typically quarterly, after being declared by the issuer of the stock.

(idiomatic) Regularly; occurring in regular time intervals or patterns.

plural of regular verb

(topology) A Hausdorff space with the additional property that for every closed set of that space and every point disjoint from that set, there are a disjoint pair of open sets which contain the closed set and the point, respectively.